Chapter 3
Hardware Overview
PCI-MIO E Series User Manual
3-4
©
National Instruments Corporation
channel basis for multimode scanning. For example, you can configure
the circuitry to scan 12 channels—four differentially-configured
channels and eight single-ended channels. Table 3-1 describes the three
input configurations.
For more information about the three types of input configuration, refer
to the Analog Input Signal Connections section in Chapter 4, Signal
Connections, which contains diagrams showing the signal paths for the
three configurations.
Input Polarity and Input Range
♦
PCI-MIO-16E-1 and PCI-MIO-16E-4
These boards have two input polarities—unipolar and bipolar. Unipolar
input means that the input voltage range is between 0 and V
ref
, where
V
ref
is a positive reference voltage. Bipolar input means that the input
voltage range is between -V
ref
/2
and + V
ref
/2. The PCI-MIO-16E-1
and PCI-MIO-16E-4
have a unipolar input range of 10 V (0 to 10 V)
and a bipolar input range of 10 V (
±
5 V).
Table 3-1. Available Input Configurations for the PCI-MIO E Series
Configuration
Description
DIFF
A channel configured in DIFF mode uses two analog
channel input lines. One line connects to the positive
input of the board programmable gain
instrumentation amplifier (PGIA), and the other
connects to the negative input of the PGIA.
RSE
A channel configured in RSE mode uses one analog
channel input line, which connects to the positive
input of the PGIA. The negative input of the PGIA is
internally tied to analog input ground (AIGND).
NRSE
A channel configured in NRSE mode uses one
analog channel input line, which connects to the
positive input of the PGIA. The negative input of the
PGIA connects to the analog input sense (AISENSE)
input.
